Author Topic: Kulthea DEM (Digital Elevation Map) ?  (Read 8394 times)

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Offline terefang

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Kulthea DEM (Digital Elevation Map) ?
« on: November 21, 2015, 05:54:26 AM »
Hi!

since i am working on a fractal renderer (such as this below),
i would like to ask if this is of any interrest to someone,
if shadow worlds dems were available,
and which programs/editors should be targeted.

i imagine this could grow to be like the middle-earth dem project ... http://www.me-dem.org/
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Offline craggles

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Re: Kulthea DEM (Digital Elevation Map) ?
« Reply #1 on: November 21, 2015, 07:17:03 AM »
I was actually thinking of something like this last night coincidently. I did think it was a little too grand for my skills though. I can't see your attachment yet because I think a mod has to authorise it first.

I use Vue Complete & World Machine for my location shots (although World Machine is a recent addition and isn't featured in any of the images below) and Poser for the people.

From smaller locations:











To larger vistas:















...so yes, DEMs would be useful. :)
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Offline craggles

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Re: Kulthea DEM (Digital Elevation Map) ?
« Reply #2 on: November 21, 2015, 09:08:01 AM »
I made this Emer map in Photoshop but DEMs had crossed my mind for an updated Jaiman map.



Detail:

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Re: Kulthea DEM (Digital Elevation Map) ?
« Reply #3 on: November 21, 2015, 07:21:09 PM »
Your attached map is available to view now and I can see you're talking of doing a global map as opposed to doing smaller areas. Are you able to control the features of the continents or are you limited to what the fractal dictates?
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Offline terefang

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Re: Kulthea DEM (Digital Elevation Map) ?
« Reply #4 on: November 22, 2015, 06:04:07 PM »
Your attached map is available to view now and I can see you're talking of doing a global map as opposed to doing smaller areas. Are you able to control the features of the continents or are you limited to what the fractal dictates?

actually what you see on the screenshot is the web-view app (done in leafletjs),
with some java on the web-server taking DEM and ColorRamp from the fractal code.

so basically with the proper reader, any DEM data could be formatted like this.

one could also produce "prerendered" tiles for a static online viewer (like most mapviewer do),
all that is needed is the tile graphics copped into the right size (256x256) and zoom level.

to produce the actual DEM from "artwork" maps is a little bit more serious work.

i have previously done work for a "Neverwinter-Nights 2" server digitizing the FR Moonsea into playable maps,
using a combination of DEM and fractal algorithms (brownian motion and perlin noise).


maybe we should start with the emer map of yours to produce a sample DEM and see where this leads us?

T.


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Offline terefang

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Re: Kulthea DEM (Digital Elevation Map) ?
« Reply #5 on: November 22, 2015, 08:18:10 PM »
my algorithms have digitized your detail picture into this (W=water, c=coast/river, _=land):
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whats much harder is to derive the elevation from the image ...
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Offline craggles

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Re: Kulthea DEM (Digital Elevation Map) ?
« Reply #6 on: November 22, 2015, 09:18:56 PM »
Oooh, I don't think your last message came out correctly. : :o

I wasn't suggesting using my images to crate the DEMs - I was just showing you what I would use DEMs for.

I will have to look at some of the books to see if any of the continent maps have contour lines. I know there are some of the smaller regional maps would have some though. A problem with the previous maps was the fact that they made these huge mountain ranges look like they were one large ridge instead of showing the clusters that would make them up - this is a huge continent larger than the US I believe and you can see how their mountain ranges are made up of multiple mountains wide an dI tried to get that same look to Emer. The old maps did look awesome though, they were well rendered and they were hand painted too! :)
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Offline terefang

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Re: Kulthea DEM (Digital Elevation Map) ?
« Reply #7 on: November 23, 2015, 03:58:37 AM »
Oooh, I don't think your last message came out correctly. : :o

I wasn't suggesting using my images to crate the DEMs - I was just showing you what I would use DEMs for.

it was only to show some visualization of parts of the technology (text based).

T.
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Offline terefang

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Re: Kulthea DEM (Digital Elevation Map) ?
« Reply #8 on: November 23, 2015, 04:45:45 AM »
hmm ... but i could use the help of an graphic artist.

one way to create a dem base is to convert rgb values based on rules.

lets say: someone draws a map (256x256) with the following properties:

* any predominately blue to be converted to water dem (R<B && G<B)
* any predominately green to be converted to grass/hill dem (R<G && B<G)
* any predominately red to be converted to mountain dem (G<R && B<R)
* any predominately yellow to be converted to river dem (R==G && G>B)

based on these hints i could fractally upscale this to a 4081x4081 dem.

if i had the exact geographic coordinates of the 256px tile,
the resulting upscale dems could be almost seamless.

T.
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Offline terefang

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Re: Kulthea DEM (Digital Elevation Map) ?
« Reply #9 on: November 23, 2015, 04:55:19 AM »
maybe i start with something simple, like the map of "vog mur" ?
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Offline craggles

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Re: Kulthea DEM (Digital Elevation Map) ?
« Reply #10 on: November 23, 2015, 08:06:36 PM »
That sounds good - do you have a copy of that map or would you like me to colour the map first?
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Offline terefang

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Re: Kulthea DEM (Digital Elevation Map) ?
« Reply #11 on: November 24, 2015, 10:02:46 AM »
That sounds good - do you have a copy of that map or would you like me to colour the map first?

i think that i have a (almost-hires) pdf version,
which TKA had done in Freehand from the old days of his freebies.
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Re: Kulthea DEM (Digital Elevation Map) ?
« Reply #12 on: November 24, 2015, 12:51:58 PM »
progress report #1

color demd the map:

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Offline terefang

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Re: Kulthea DEM (Digital Elevation Map) ?
« Reply #13 on: November 24, 2015, 01:17:45 PM »
progress report #2:
convert to heightmap
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Re: Kulthea DEM (Digital Elevation Map) ?
« Reply #14 on: November 24, 2015, 01:18:21 PM »
progress report #3
imported into wilbur
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Re: Kulthea DEM (Digital Elevation Map) ?
« Reply #15 on: November 25, 2015, 02:41:52 AM »
progress report #4 (and final)
oversampling with additional blur and multi-fractal noise gives this
(exported from wilbur)
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Offline craggles

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Re: Kulthea DEM (Digital Elevation Map) ?
« Reply #16 on: November 25, 2015, 09:02:09 AM »
...eagerly awaits the approval of the attachment...
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Offline markc

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Re: Kulthea DEM (Digital Elevation Map) ?
« Reply #17 on: November 25, 2015, 01:25:44 PM »
Approved. ;D
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Offline DragonReborn

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Re: Kulthea DEM (Digital Elevation Map) ?
« Reply #18 on: November 26, 2015, 06:28:47 AM »
Drool......

I seriously admire these undertakings and skills involved. It would be great to have maps like these available for the existing Shadow World modules. Maybe as paid downloads at the onebookshelf sites?

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Re: Kulthea DEM (Digital Elevation Map) ?
« Reply #19 on: November 26, 2015, 05:26:44 PM »
I was hoping that the end result would be smoother and a lot less stepped.

Can the noise texture be layered with another larger texture to break up the even distribution?

I went to look in my archives for the Terry's Vog Mur map and I commend you on the tracing - that map was incredibly low-res.  :o
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